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370121e5 JB |
1 | /* |
2 | * Event system | |
4855d25b JB |
3 | * Also see comments in public header file and longer explanation below. |
4 | * | |
79859051 JB |
5 | * Copyright (c) 2005, 2006 Johannes Berg <johannes@sipsolutions.net> |
6 | * Joseph Jezak <josejx@gentoo.org> | |
7 | * Larry Finger <Larry.Finger@lwfinger.net> | |
8 | * Danny van Dyk <kugelfang@gentoo.org> | |
9 | * Michael Buesch <mbuesch@freenet.de> | |
4855d25b JB |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of version 2 of the GNU General Public License as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
16 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
18 | * more details. | |
370121e5 | 19 | * |
4855d25b JB |
20 | * You should have received a copy of the GNU General Public License |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution in the | |
25 | * file called COPYING. | |
26 | */ | |
27 | ||
28 | #include "ieee80211softmac_priv.h" | |
29 | ||
30 | /* | |
370121e5 JB |
31 | * Each event has associated to it |
32 | * - an event type (see constants in public header) | |
33 | * - an event context (see below) | |
34 | * - the function to be called | |
35 | * - a context (extra parameter to call the function with) | |
36 | * - and the softmac struct | |
37 | * | |
38 | * The event context is private and can only be used from | |
39 | * within this module. Its meaning varies with the event | |
40 | * type: | |
41 | * SCAN_FINISHED: no special meaning | |
42 | * ASSOCIATED, | |
43 | * ASSOCIATE_FAILED, | |
44 | * ASSOCIATE_TIMEOUT, | |
45 | * AUTHENTICATED, | |
46 | * AUTH_FAILED, | |
47 | * AUTH_TIMEOUT: a pointer to the network struct | |
48 | * ... | |
49 | * Code within this module can use the event context to be only | |
50 | * called when the event is true for that specific context | |
51 | * as per above table. | |
52 | * If the event context is NULL, then the notification is always called, | |
53 | * regardless of the event context. The event context is not passed to | |
54 | * the callback, it is assumed that the context suffices. | |
55 | * | |
56 | * You can also use the event context only by setting the event type | |
57 | * to -1 (private use only), in which case you'll be notified | |
58 | * whenever the event context matches. | |
59 | */ | |
60 | ||
61 | static char *event_descriptions[IEEE80211SOFTMAC_EVENT_LAST+1] = { | |
62 | "scan finished", | |
63 | "associated", | |
64 | "associating failed", | |
65 | "associating timed out", | |
66 | "authenticated", | |
67 | "authenticating failed", | |
68 | "authenticating timed out", | |
69 | "associating failed because no suitable network was found", | |
feeeaa87 | 70 | "disassociated", |
370121e5 JB |
71 | }; |
72 | ||
73 | ||
74 | static void | |
75 | ieee80211softmac_notify_callback(void *d) | |
76 | { | |
77 | struct ieee80211softmac_event event = *(struct ieee80211softmac_event*) d; | |
78 | kfree(d); | |
79 | ||
80 | event.fun(event.mac->dev, event.context); | |
81 | } | |
82 | ||
83 | int | |
84 | ieee80211softmac_notify_internal(struct ieee80211softmac_device *mac, | |
85 | int event, void *event_context, notify_function_ptr fun, void *context, gfp_t gfp_mask) | |
86 | { | |
87 | struct ieee80211softmac_event *eventptr; | |
88 | unsigned long flags; | |
89 | ||
90 | if (event < -1 || event > IEEE80211SOFTMAC_EVENT_LAST) | |
91 | return -ENOSYS; | |
92 | ||
93 | if (!fun) | |
94 | return -EINVAL; | |
95 | ||
96 | eventptr = kmalloc(sizeof(struct ieee80211softmac_event), gfp_mask); | |
97 | if (!eventptr) | |
98 | return -ENOMEM; | |
99 | ||
100 | eventptr->event_type = event; | |
101 | INIT_WORK(&eventptr->work, ieee80211softmac_notify_callback, eventptr); | |
102 | eventptr->fun = fun; | |
103 | eventptr->context = context; | |
104 | eventptr->mac = mac; | |
105 | eventptr->event_context = event_context; | |
106 | ||
107 | spin_lock_irqsave(&mac->lock, flags); | |
108 | list_add(&eventptr->list, &mac->events); | |
109 | spin_unlock_irqrestore(&mac->lock, flags); | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
114 | int | |
115 | ieee80211softmac_notify_gfp(struct net_device *dev, | |
116 | int event, notify_function_ptr fun, void *context, gfp_t gfp_mask) | |
117 | { | |
118 | struct ieee80211softmac_device *mac = ieee80211_priv(dev); | |
119 | ||
120 | if (event < 0 || event > IEEE80211SOFTMAC_EVENT_LAST) | |
121 | return -ENOSYS; | |
122 | ||
123 | return ieee80211softmac_notify_internal(mac, event, NULL, fun, context, gfp_mask); | |
124 | } | |
125 | EXPORT_SYMBOL_GPL(ieee80211softmac_notify_gfp); | |
126 | ||
127 | /* private -- calling all callbacks that were specified */ | |
128 | void | |
129 | ieee80211softmac_call_events_locked(struct ieee80211softmac_device *mac, int event, void *event_ctx) | |
130 | { | |
131 | struct ieee80211softmac_event *eventptr, *tmp; | |
feeeaa87 | 132 | struct ieee80211softmac_network *network; |
370121e5 JB |
133 | |
134 | if (event >= 0) { | |
feeeaa87 JB |
135 | union iwreq_data wrqu; |
136 | int we_event; | |
137 | char *msg = NULL; | |
138 | ||
139 | switch(event) { | |
140 | case IEEE80211SOFTMAC_EVENT_ASSOCIATED: | |
141 | network = (struct ieee80211softmac_network *)event_ctx; | |
142 | wrqu.data.length = 0; | |
143 | wrqu.data.flags = 0; | |
144 | memcpy(wrqu.ap_addr.sa_data, &network->bssid[0], ETH_ALEN); | |
145 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
146 | we_event = SIOCGIWAP; | |
147 | break; | |
148 | case IEEE80211SOFTMAC_EVENT_DISASSOCIATED: | |
149 | wrqu.data.length = 0; | |
150 | wrqu.data.flags = 0; | |
151 | memset(&wrqu, '\0', sizeof (union iwreq_data)); | |
152 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
153 | we_event = SIOCGIWAP; | |
154 | break; | |
6788a07f JB |
155 | case IEEE80211SOFTMAC_EVENT_SCAN_FINISHED: |
156 | wrqu.data.length = 0; | |
157 | wrqu.data.flags = 0; | |
158 | memset(&wrqu, '\0', sizeof (union iwreq_data)); | |
159 | we_event = SIOCGIWSCAN; | |
160 | break; | |
feeeaa87 JB |
161 | default: |
162 | msg = event_descriptions[event]; | |
163 | wrqu.data.length = strlen(msg); | |
164 | we_event = IWEVCUSTOM; | |
165 | break; | |
166 | } | |
167 | wireless_send_event(mac->dev, we_event, &wrqu, msg); | |
370121e5 JB |
168 | } |
169 | ||
170 | if (!list_empty(&mac->events)) | |
171 | list_for_each_entry_safe(eventptr, tmp, &mac->events, list) { | |
172 | if ((eventptr->event_type == event || eventptr->event_type == -1) | |
173 | && (eventptr->event_context == NULL || eventptr->event_context == event_ctx)) { | |
174 | list_del(&eventptr->list); | |
5c4df6da | 175 | schedule_work(&eventptr->work); |
370121e5 JB |
176 | } |
177 | } | |
178 | } | |
179 | ||
180 | void | |
181 | ieee80211softmac_call_events(struct ieee80211softmac_device *mac, int event, void *event_ctx) | |
182 | { | |
183 | unsigned long flags; | |
184 | ||
185 | spin_lock_irqsave(&mac->lock, flags); | |
186 | ieee80211softmac_call_events_locked(mac, event, event_ctx); | |
187 | ||
188 | spin_unlock_irqrestore(&mac->lock, flags); | |
189 | } |